The problem presented to us by Miss Violet Marsh made a rather pleasant change from our usual routine work. Poirot had received a brisk and businesslike note from the lady asking for an appointment, and he had replied, asking her to call upon him at eleven o’clock the following day. She arrived punctually—a tall, handsome young woman, plainly but neatly dressed, with an assured and businesslike manner—clearly, a young woman who meant to get on in the world. I am not a great admirer of the so-cal